let reg = new RegExp("^[a-zA-Z0-9-_()\u4e00-\u9fa5]+$") //测试中文英文下划线横线 数字
let reg2= new RegExp("[\u4e00-\u9fa5]{0,}$")
let str = '564645645w1我_-'
let str2 = '我我'
console.log(reg.test(str))
console.log(reg2.test(str2),'2')